I had a similar experience with armando, he came home ill. Mexico have some corruption problems as well and is hard to find reliable breeders, mine was clearly not one. Armando arrived on a Wednesday, after a few days with me he was lethargic and had a bad sinus infection we rushed to the vet and started collapsing in front of my eyes!! it was horrible he was nebulized and the vet gave him some shots (antibiotics) he was not eating anything at all. The vet send me home after he was stabilized and told me to give him oral serum for kids and food supplement 1cc to 2cc every hour for two days and antibiotics once a day . After 3 days he started improving and now armando is gaining weight and becoming a big parrot. After the illness he had a weaning regressing and just ate hand feeding formula but that help him a lot to gain weight.
When you give them the antibiotic was he drinking the water? my vet told me to give him directly because they don't usually drink or eat when sick and also a key thing was keeping him hidratated as well, especially when diarrhea is present. Do some lab tests as soon as you suspect something but start with a general antibiotic and then switch to the proper one according to the lab tests results, some labs do a sensitivity test in order to see what antibiotic is the most effective.
My best to you,
Marco
When you give them the antibiotic was he drinking the water? my vet told me to give him directly because they don't usually drink or eat when sick and also a key thing was keeping him hidratated as well, especially when diarrhea is present. Do some lab tests as soon as you suspect something but start with a general antibiotic and then switch to the proper one according to the lab tests results, some labs do a sensitivity test in order to see what antibiotic is the most effective.
My best to you,
Marco